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This is a common question regarding artificial grass, especially from customers with lawns that do not face the sun and cannot soak up water. With artificial grass there is no need to worry about water drainage, artificial lawns drain water as if it is regular grass and even better in some cases.
After the existing lawn is removed to a depth of between 60 and 80mm, a sub-base consisting of type 1 limestone then a layer of grano dust is distributed. Limestone is the most porous type of aggregate as it is made from permeable materials. This covers the entire lawn area at an even and consistent level ensuring a stable draining base for years to come.
The roll of grass is manufactured with a holed backing that is concealed within the pile height and not visible when laid. Water simply drains straight through these holes and into the aggregate base below.
Due to this, artificial lawns dry relatively quickly compared to regular lawns.